Luma contrast is not enough. The primate brain (including the human brain) processes luma and color in 2 parallel systems. While this does have an efficiency advantage, it leaves us sessepible to visual artifacts caused by conflicting pattern analysis results from the 2 systems.

In reply to Re^2: Ordering colors for contrast (luma) by RonW
in thread [OT] Ordering colors by BrowserUk

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